package com.gaohe.config;

import com.gaohe.common.JacksonObjectMapper;
import com.gaohe.interceptor.LoginInterceptor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.*;

import java.util.List;

@Configuration
@EnableWebMvc
@Slf4j
public class SpringmvcSupport implements WebMvcConfigurer {
    @Autowired
    private LoginInterceptor loginInterceptor;
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/back/**").addResourceLocations("classpath:/back/");
        log.info("静态资源放行");
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(loginInterceptor).addPathPatterns("/**");
    }

    /**
     * 扩展mvc框架的消息转换器
     * @param converters
     */
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0,messageConverter);
    }

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        // 添加映射路径
        registry.addMapping("/**")
                .allowedOriginPatterns("*") // 允许哪些域的请求，星号代表允许所有
                .allowedMethods("POST", "GET", "PUT", "OPTIONS", "DELETE") // 允许的方法
                .allowedHeaders("*") // 允许的头部设置
                .allowCredentials(true) // 是否发送cookie
                .maxAge(168000); // 预检间隔时间
    }

}
